I've noticed a kind of tribal individualist that's common online. They move in mobs, make nearly identical objections, claim not be a group or believe in groups, and are extremely hostile to the identities of others.

They've also been REALLY BAD for online scientific discourse.

Many people believe in individualism so strongly that they seem incapable of perceiving anything to do with groups. They don't understand sociology as a category of knowledge or social problems as anything more than a collection of the unique challenges of individuals.

Many individualists don't believe in sociology. They see it as a false science. Since groups don't exist for them, only individuals, they don't think sociological can exist either. After all, how can one scientifically study groups when groups aren't real?

Many individualists don't understand public health. Inherent in the idea of public health is the idea that you personally might have to sacrifice for the well-being of others. That doesn't sit well with them so they reject public health as a false ideal.

Since many individualists claim not to be part of groups, they often substitute group identity with pledges of allegiance to ideas. They might say "I believe in logic and reason". They will say this even when they've long since abandoned logic and reason.